Na+-K+-ATPase is distributed to microvillous and basal membrane of the syncytiotrophoblast in human placenta
Despite its importance for placental function, syncytiotrophoblast Na+-K+-ATPase has not been studied in detail. We purified syncytiotrophoblast microvillous (MVM) and basal (BM) membranes from full-term human placenta. Western blotting with isoform-specific antibodies demonstrated the presence of the α1-subunit, but not the α2- or α3-subunits, in MVM and BM. Relative density per unit membrane pro